You might get away with it road racing, but I bet not on the dirt. The more RPM's that the clutch is spinning the easier it is on it. A speedway kart doesn't really have all that much axle RPM's, and the torque is what will kill the clutch. A pair of almost anything has pretty good torque and more weight too. Give it a shot, I bet I can tell you what, and in what order you will wreck in that clutch. I will post some pics later of the one I modified when I am on my home computer. My recommendation is if you gonna have two engines, have two clutches.
SMC is a great choice.
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